SODIUMDIHYDROPHOSPHATE
sodium dihydrogen phosphate anhydrous
CAS: 7558-80-7;89140-32-9
Molecular Formula: H3O4P.Na
SODIUMDIHYDROPHOSPHATE - Names and Identifiers
SODIUMDIHYDROPHOSPHATE - Physico-chemical Properties
| Molecular Formula | H3O4P.Na |
| Molar Mass | 119.977 |
| Density | 1.40g/mLat 20°C |
| Melting Point | <0°C |
| Boling Point | 100°C |
| Water Solubility | Soluble in water. Insoluble in alcohol,ether and chloroform. |
| Solubility | H2O: 5M, clear, colorless |
| Vapor Presure | 0Pa at 20℃ |
| Appearance | Crystalline powder |
| Color | White |
| Maximum wavelength(λmax) | ['λ: 260 nm Amax: ≤0.025', , 'λ: 280 nm Amax: ≤0.02'] |
| Merck | 14,8660 |
| BRN | 3903772 |
| pKa | (1) 2.15, (2) 6.82, (3) 12.38 (at 25℃) |
| PH | 4.0 - 4.5 (25℃, 50g/L in water) |
| Storage Condition | room temp |
| Stability | Stable. Incompatible with heavy metals, strong acids. |
| Sensitive | Hygroscopic |
| MDL | MFCD00003527 |
| Physical and Chemical Properties | Melting point <0°C boiling point 100°C density 1.40g/mL at 20°C storage conditions Store at RT. solubility H2O: 5 M, clear, colorless form powder sensitive hygropic Merck 14,8660 |
| Use | Used in boiler water treatment, electroplating, leather making, dye, medicine, food and other industries |
SODIUMDIHYDROPHOSPHATE - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R36 - Irritating to the eyes |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S39 - Wear eye / face protection. |
| WGK Germany | 1 |
| RTECS | WA1900000 |
| FLUKA BRAND F CODES | 3 |
| TSCA | Yes |
| HS Code | 28352200 |
| Toxicity | LD50 orally in Rabbit: 8290 mg/kg LD50 dermal Rabbit > 7940 mg/kg |
SODIUMDIHYDROPHOSPHATE - Upstream Downstream Industry
| Raw Materials | Sodium carbonate Phosphoric acid Sodium hydroxide Sodium hydroxide Sodium carbonate |
| Downstream Products | Sodium hexametaphosphate Potassium Phosphate Monobasic |
SODIUMDIHYDROPHOSPHATE - Reference
| Reference Show more | 1. Li Xiaoshuang, Wei Yuping, Wang Qingqing et al. Effect of multi-component selection of freeze-dried preparation system on collapse temperature [J]. Journal of Shandong University (Natural Science Edition) 2012 47(7):10-13. 2. Li Chunlong, Li Xiaoshuang, Xu Xia. Simulation and visual measurement of system pH during freeze-drying [J]. Journal of Shandong University (Natural Science Edition) 2013(05):39-42. 3. Liang Xinhe, Wang Tao, du Yanjia, et al. Optimization of extraction technology of hypoglycemic components from Birch antler and corn silk by orthogonal experiment [J]. Jilin traditional Chinese medicine, 2019. 4. Zhang ningying, Chen Haiyan, Chen Hangjun. Effects of Ozone treatment on storage quality and antioxidant enzyme activities of blueberry [J]. Chinese Journal of Food Science, 2017, 17(008):170-176. 5. Zhao Shi-lei, He Xu, Wang Ai-Zhu, et al. Study on improving the content of isoflavone aglycones in soybean milk by enzymatic method [J]. Food industry, 2019, 040(001):100-104. 6. [IF = 4.451] Shuaishuai Yan et al."Non-extractable polyphenols of green tea and their antioxidant, anti-α-glucosidase capacity, and release during in vitro digestion."J Funct Foods. 2018 Mar;42:129 7. [IF=3.638] Zhenbao Zhu et al."Ultrasound improving the physical stability of oil-in-water emulsions stabilized by almond proteins."J Sci Food Agr. 2018 Aug;98(11):4323-4330 8. [IF=5.485] Xiao-qiang Cao et al."CuFe2O4 supported on montmorillonite to activate peroxymonosulfate for efficient ofloxacin degradation."J Water Process Eng. 2021 Dec;44:102359 |
SODIUMDIHYDROPHOSPHATE - Nature
Open Data Verified Data
colorless crystal or white crystalline powder; Odorless, salty. Slight deliquescence. Soluble in water, almost insoluble in ethanol. Water was lost at 100 °c. Its aqueous solution is acidic.
Last Update：2024-01-02 23:10:35
SODIUMDIHYDROPHOSPHATE - Preparation Method
Open Data Verified Data
industrial production methods include disodium hydrogen phosphate neutralization method and soda ash neutralization method.
- disodium hydrogen phosphate neutralization method: add water to dissolve disodium hydrogen phosphate dodecahydrate in a ratio of 3:2, remove insoluble matters by filtration, add the filtrate to a neutralizer, slowly add phosphoric acid under stirring for neutralization reaction, the pH value was controlled at 4.2 to 4.6, and the reaction solution was concentrated by evaporation until a crystalline film was formed. After cooling crystallization, centrifugation was carried out to obtain sodium dihydrogen phosphate dihydrate. The product was then dried at 100 °c to obtain a final anhydrous sodium dihydrogen phosphate. The mother liquor may be returned for dissolution of disodium hydrogen phosphate.
- soda ash neutralization method: the extraction phosphoric acid is added to the neutralization reactor, and the soda ash solution is slowly added under stirring for neutralization reaction to generate sodium dihydrogen phosphate, which is filtered and evaporated and concentrated, the crystals were precipitated by cooling to 60-70 ° C. And centrifuged to obtain sodium dihydrogen phosphate dihydrate. After air drying, prepared anhydrous sodium dihydrogen phosphate product.
Last Update：2022-01-01 09:07:53
SODIUMDIHYDROPHOSPHATE - Introduction
Tasteless. Micro moisture absorption. Heating to 225-250 ℃ to produce acidic sodium pyrophosphate, 350-400 ℃ to form sodium metaphosphate. Median lethal dose (rat, muscle) 250mg/kg. Easily soluble in water, the aqueous solution is acidic, can agglomerate in humid air, and is almost insoluble in ethanol. When heated to 100 ℃, it dehydrates, generates sodium pyrophosphate at 190-210 ℃, and decomposes into sodium metaphosphate at 280-300 ℃. Solubility in water: 850g/L (20°C)
Last Update：2022-10-16 17:28:26
SODIUMDIHYDROPHOSPHATE - Use
Open Data Verified Data
used as a reactive dye auxiliary. For phosphate-modified starch. Preparation of special compound food phosphate.
Last Update：2022-01-01 09:04:49
SODIUMDIHYDROPHOSPHATE - Safety
Open Data Verified Data
- rat oral LD50:8290mg/kg. ADI0 ~ 70mg/kg (total phosphate in terms of phosphorus, FAO/WHO,2001). It is microtoxic. Has a stimulating effect on the eyes and skin. The smoke of phosphorus oxide and sodium oxide is released by thermal decomposition.
- should be stored in a cool, ventilated, dry warehouse. No open-air cargo yard shall be stacked. It is not allowed to be co-stored with moist or toxic substances. During transport, it shall be protected against rain and sun exposure, moisture and weathering. When loading and unloading should be handled with light, to prevent the package rupture. Packed in plastic woven bags lined with polyethylene plastic bags, each with a net weight of 25kg or 50kg. Fire, can use water, dry sand, all kinds of fire extinguishing.
Last Update：2022-01-01 09:07:54
SODIUMDIHYDROPHOSPHATE - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | sodium dihydrogen phosphate is colorless crystal or white crystalline powder, odorless, soluble in water, and its aqueous solution is acidic, almost insoluble in ethanol, heat loss of crystal water can be decomposed into acidic sodium pyrophosphate (Na3H2P2O7). Commonly used in the fermentation industry to adjust the pH, food processing with disodium hydrogen phosphate used as food quality improver. Such as improving the thermal stability of dairy products, fish products to do the pH regulator and the binding agent. |
| trait | sodium dihydrogen phosphate was colorless columnar crystal, without slightly deliquescence. Relative density of 2.04, melting point of 60 deg C, soluble in water, insoluble in ethanol. When heated below 100 ℃, it can be dissolved in crystal water to form a salt of water; When heated to 100 ℃, it loses crystal water and becomes anhydrous. If it continues to be heated, it becomes sodium metaphosphate. |
| Use | sodium dihydrogen phosphate is mainly used in food as a buffer, improver, emulsifier, nutritional agent. for boiler water treatment, electroplating. It is a raw material for the manufacture of sodium hexametaphosphate and polycondensed phosphates. It is also used in the manufacture of detergents, metal detergents, as dye auxiliaries and pigment precipitants. Mica sheet bonding. Acidity buffer. Baking powder manufacturing. used in boiler water treatment, electroplating, leather making, dye, medicine, food and other industries used as analytical reagent, buffer and soft water agent buffer, soft water agent. The pharmaceutical industry is used for the manufacture of stimulants and fruit salts. It is used as a detergent, acidity buffer and dye additive, and also used in boiler water treatment, mica sheet bonding, baking powder manufacturing and electroplating. |
| Application | sodium dihydrogen phosphate has a wide range of uses, which can be used as raw materials for the manufacture of sodium hexametaphosphate and sodium pyrophosphate; It can also be used for leather making and treating boiler water; as a quality improver and baking powder, in the food industry, fermentation industry as a buffer and baking powder raw materials; Also used as feed additives, detergents and dyeing AIDS; In the food industry, fermentation Industry can also be used as a buffer, as a raw material of baking powder, bread, sauce sticky material and curing agent, powder acid agent, do the quality improver of evaporated milk; Can also be made cheese and other dairy products, meat, stabilizers and binders for fish products, buffering agents for baking powder, mixed salts for curing, etc. |
| preparation | the method for preparing sodium dihydrogen phosphate from wet-process phosphoric acid comprises the following steps: (1) impurity removal from wet-process phosphoric acid: the solid impurities contained in wet-process phosphoric acid are removed by centrifugation or pressure filtration to obtain phosphoric acid for later use; (2) synthesis reaction of intermediate: step (1) the obtained phosphoric acid is put into the intermediate synthesis tank, the concentration of phosphoric acid is adjusted, the temperature is heated to 40 ℃-90 ℃, and the carbamide and phosphoric acid are added for synthesis reaction under stirring, according to the molar ratio of carbamide to phosphoric acid (0.9-1.05):1, the reaction time was 40 min-120min; (3) the intermediate was obtained by cooling crystallization: after the completion of the synthesis reaction, the obtained intermediate slurry is put into a cooling crystallization tank to be cooled to a temperature of less than or equal to 40 ° C., centrifuged, and the filter cake is retained, which is an intermediate, and is put into an intermediate storage bin for standby; (4) preparation of sodium dihydrogen phosphate: the intermediate is sent to the synthesis tank, and the reaction is mixed with sodium hydroxide, and the molar ratio of the intermediate to the sodium hydroxide is (1-1.2):1, controlling the rate of addition of sodium hydroxide In order to adjust the temperature in the synthesis tank in the range of 40 ℃-90 ℃, the reaction is stirred for 20min-100min; After the reaction is finished, the sodium dihydrogen phosphate slurry is cooled to temperature less than or equal to 40 ℃, cooling crystallization, after the crystals are precipitated, they are centrifuged in a centrifuge. The filtrate is a slurry containing carboxamide, and the carboxamide is recovered. The intermediate synthesis tank in step (2) is returned to produce the intermediate, and the filter cake is sodium dihydrogen phosphate product, packaging after drying. |
| toxicity | 85% sodium carbonate 0.820 sodium carbonate (Na2CO 398%)0.360 Japanese phosphoric acid (H3PO4 89%)0.780 soda ash (Na2CO3)0.350 |
| production method | see sodium dihydrogen phosphate anhydrous. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:52:54
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Raw Materials for SODIUMDIHYDROPHOSPHATE
Downstream Products for SODIUMDIHYDROPHOSPHATE